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Finding the Fourth Proportional to 129,348.52, 178,522.80 and 74,892.76

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Solution

The fourth proportional to 129,348.52, 178,522.80 and 74,892.76 is: 103,364.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,348.52 : 178,522.80 = 74,892.76 : x
  2. Step 2: Convert to fraction form
    129,348.52/178,522.80 = 74,892.76/x
  3. Step 3: Cross multiply
    129,348.52x = 178,522.80 × 74,892.76
  4. Step 4: Simplify right side
    129,348.52x = 13,370,065,214.93
  5. Step 5: Solve for x
    x = 13,370,065,214.93/129,348.52
  6. Step 6: Final answer
    x = 103,364.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.